Maybe come up with some ideas when you're not dissociated?

L and I have a bunch of different activities to do when I'm getting close or am outside my window of tolerance. Things like handholding, pick your poison questions, talking about my dogs, deep breathing, etc. She'll usually suggest something and we try it. If that doesn't work, we try something else. And we always start the session determining where I'm at in the window, and she or I checks in if either notice me starting to dissociate.